supply of dga calibration gas mixturedga calibration gas mixture,dga calibration gas mixture (standard gas) in 500ml cylinder aluminium can contain 10 litre s of available gas at pressure 20 kg/cm2 with following compositions, 1) 1000 ppm - methane, 2)1000 ppm- ethane, 3) 1000 ppm -ethylene, 4) 1000 ppm-acetylene, 5) 1000 ppm-hydrogen, 6) 5000 ppm - carbon dioxi de, 7) 5000 ppm -carbonmonoxide,8) balance-nitrogen note:- 1) firm shall supply in cans of each capacity 500 ml with septum type needle valve for drawing the gas. 2) gas composition and gas quantity certificate must be provided & its traceability to: npl delhi , preparation tolerance +/-10%, certificate accuracy +/-2 %, stability 12 months minimum along with the supply of material. [ warranty period: 12 months after th e date of delivery ] ]